Then there's no really need to use whom whatsoever (as well as great vast majority of people don't). Are you presently interested in how people used to make it happen? Use 'whom whenever it is a direct or oblique item (like after a preposition like 'to'). Random triangle on https://financefeeds.com/bitcoin-cash-nears-500-after-22-price-surge-bitcoin-layer-2-presale-raises-1-4-million/